The benefits of being dominant:health correlates of male social rank and age in a marmot

作     者：Kenta UCHIDA Rachel NG Samuel A.VYDRO Jennifer E.SMITH Daniel T.BLUMSTEIN 

作者机构：Department of Ecology&Evolutionary BiologyUniversity of CaliforniaLos AngelesCA 90095-1606USA Department of BiologyMills CollegeOaklandCA 94613USA The Rocky Mountain Biological LaboratoryCrested ButteCO 81224USA 

出 版 物：《Current Zoology》 (动物学报（英文版）)

年 卷 期：2022年第68卷第1期

页      面：19-26页

核心收录：

学科分类：0710[理学-生物学] 07[理学] 071002[理学-动物学] 

基　　金：K.U.was supported by the Japan Society for the Promotion of Science Overseas Research Fellowship.J.E.S.was supported by the American Association of University Women Institute for Society and Genetics at the University of California Los Angeles and American Philosophical Society for fellowships.D.T.B.was supported by the National Geographic Society UCLA(Faculty Senate and the Division of Life Sciences) a Rocky Mountain Biological Laboratory research fellowship and by the National Science Foundation(I.D.B.R.-0754247 and D.E.B.-1119660 and 1557130 to D.T.B. as well as D.B.I.0242960 0731346 and 1226713 RMBL) 

主　　题：immunocompetence handicap hypothesis life history trade-offs N/L ratio physiological stress resource quality hypothesis 

摘      要：The benefits of dominance may not come without costs,particularly for *** example,the“immunocompetence handicap hypothesisstates that males with enhanced mating success allocate resources to enhance reproductive output at a cost to their current health,whereas the“resource quality hypothesispredicts that high-ranking males may benefit from increased reproduction and good *** the predictions from each have been well tested in captive animals and in a variety of highly social primates,fewer studies have been carried out in free-living,facultatively social *** adult male yellow-bellied marmots(Marmota flaviventer),we evaluated predictions of these hypotheses by examining the relationship between social rank and 2 health indicators—fecal glucocorticoid metabolite(FCM)levels,and neutrophil/lymphocyte(N/L)ratios—after accounting for variation explained by age,body mass,and *** found that higher-ranking males tended to have a lower N/L ratio(reflecting good health)than lower-ranking individuals,whereas FCM levels were not significantly related to *** addition,heavier male marmots had lower N/L ratios,whereas body mass was not associated with FCM *** also found that older adult males had lower FCM levels(reflecting less physiological stress)but higher N/L ratios than younger ***,we found that FCM levels decreased as the active season progressed and FCM levels were associated with the time of the ***,our results suggest that socially-dominant male marmots enjoyed better,not worse health in terms of lower N/L ratios.